44490991 has 4 divisors (see below), whose sum is σ = 44526592. Its totient is φ = 44455392.

The previous prime is 44490977. The next prime is 44491037. The reversal of 44490991 is 19909444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44490991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44470991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15855 + ... + 18448.

It is an arithmetic number, because the mean of its divisors is an integer number (11131648).

Almost surely, 2^44490991 is an apocalyptic number.

44490991 is a deficient number, since it is larger than the sum of its proper divisors (35601).

44490991 is a wasteful number, since it uses less digits than its factorization.

44490991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35600.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 44490991 is about 6670.1567447849. The cubic root of 44490991 is about 354.3431376575.

The spelling of 44490991 in words is "forty-four million, four hundred ninety thousand, nine hundred ninety-one".